Tunable Emission Phosphor Ca0.75Sr0.2Mg1.05(Si2O6):Eu2+, Mn2+: Luminescence and Mechanism of Host, Energy Transfer of Eu2+ → Mn2+, Eu2+ → Host, and Host → Mn2+,The Journal of Physical Chemistry C

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Tunable Emission Phosphor Ca0.75Sr0.2Mg1.05(Si2O6):Eu2+, Mn2+: Luminescence and Mechanism of Host, Energy Transfer of Eu2+ → Mn2+, Eu2+ → Host, and Host → Mn2+
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2016-09-02 00:00:00 , DOI: 10.1021/acs.jpcc.6b05993
Yuansheng Sun ₁ , Panlai Li ₁ , Zhijun Wang ₁ , Jinge Cheng ₁ , Zhenling Li ₁ , Chao Wang ₁ , Miaomiao Tian ₁ , Zhiping Yang ₁

Affiliation

A series of Ca_0.75Sr_0.2Mg_1.05(Si₂O₆) (CSMS):xEu²⁺, yMn²⁺ phosphors were synthesized by a high temperature solid state reaction technique in a reducing atmosphere (1250 °C, 4 h). Under excitation of 270 nm, the emission spectrum of CSMS host is characterized by a broad band with two distinct emission peaks (453 and 580 nm), tailing on the energy side from approximately 350 to 800 nm. Thus, there is an orange-yellow emission in CSMS host. The different trap depths of thermoluminescence spectra (E₁ = 0.6453 eV, E₂ = 0.8271 eV) are measured and these traps will fade away when Eu²⁺ or Mn²⁺ ions are doped. In addition, the blue-shift, red-shift, and intensity changes of temperature dependence emission spectra in Ca_0.75Sr_0.2Mg_1.05(Si₂O₆) host are observed with higher temperature. For Eu²⁺ single doped CSMS, which has an obvious absorption in the near-ultraviolet and blue region with a wide band of excitation spectrum ranging from 200 to 450 nm monitored at 453 nm. And the emission spectrum presents an obvious red-shift phenomenon. Mn²⁺ single-doped CSMS presents the weak emission intensity at 680 nm with the excitation of 415 nm. For Eu²⁺ and Mn²⁺ codoped, the energy transfer of Eu²⁺ → Mn²⁺, Eu²⁺ → host, and host → Mn²⁺ can be demonstrated, and there should be a blue-white emission in CSMS:0.03Eu²⁺, 0.02Mn²⁺ with CIE (0.2682, 0.2056). In short, the CSMS host presents a good application prospect in near-ultraviolet trichromatic field of white LEDs, and the luminescence properties of CSMS:xEu²⁺, yMn²⁺ phosphors are particularly worthy of academic investigation.

中文翻译：

可调谐发射磷Ca _0.75 Sr _0.2 Mg _1.05（Si ₂ O ₆）：Eu 2 ⁺，Mn ²⁺：主体的发光和机理，Eu 2 ⁺ →Mn 2 ⁺，Eu 2 ⁺ →主体和主体→的能量转移锰²⁺

通过高温固态反应技术在还原气氛（1250°C，4 h）下合成了一系列Ca _0.75 Sr _0.2 Mg _1.05（Si ₂ O ₆）（CSMS）：x Eu 2 ⁺，y Mn ²⁺荧光粉）。在270 nm的激发下，CSMS主机的发射光谱的特征是具有两个不同发射峰（453和580 nm）的宽带，在能量侧拖尾大约为350至800 nm。因此，CSMS主机中会发出橙黄色的光。热发光光谱的不同陷阱深度（E ₁ = 0.6453 eV，E ₂= 0.8271 eV），并且当掺杂Eu ²⁺或Mn ²⁺离子时，这些陷阱会消失。另外，在较高温度下观察到Ca _0.75 Sr _0.2 Mg _1.05（Si ₂ O ₆）主体中的温度依赖性发射光谱的蓝移，红移和强度变化。对于Eu ²⁺单掺杂CSMS，它在近紫外和蓝色区域具有明显的吸收，并在453 nm处监测到200至450 nm的宽激发光谱。发射光谱呈现明显的红移现象。锰²⁺单掺杂CSMS在680 nm处激发强度为415 nm时呈现出较弱的发射强度。对于共掺杂的Eu ²⁺和Mn ²⁺，可以证明Eu 2 ⁺ →Mn 2 ⁺，Eu 2 ⁺ →主体和主体→Mn ²⁺的能量转移，并且在CSMS中应该有蓝白色发射： 0.03Eu 2 ⁺，0.02Mn ²⁺和CIE（0.2682，0.2056 ）。简而言之，CSMS主机在白色LED的近紫外三基色领域具有良好的应用前景，CSMS的发光特性：x Eu 2 ⁺，y Mn ²⁺荧光粉特别值得学术研究。

更新日期：2016-09-02

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